Alan MacRobert suggests an alternative (or addition) to watching the football game in his Sky & Telescope article on Comet ISON.

on Thanksgiving Day when the relatives are gathered, set the living-room computer to display NASA's Google+ Hangout: Comet ISON Live. The hangout will be on for 90 minutes right around perihelion, from 1:30 to 3:00 p.m. EST (18:30–20:00 UT) November 28th. They're billing it as "Fire vs. ISON: Watch the Epic Battle Live."

MacRobert's article also includes a nifty viewing chart for the early part of December.